Finally, Del Rio said that Welker suffered a concussion and that the team would follow the league's protocol.

"It’s my understanding that we followed protocol," Del Rio said. "He was cleared to return and he had symptoms that flared up, or came up, and then he was pulled. So he’ll go through the protocol this week. The first concern, obviously, is to make sure he’s ready to return when the doctors give the green light. When we’ve been told that he’s able to go, then he’ll go. Until then, he’ll be following that protocol."